Source : Webster's Revised Unabridged Dictionary (1913)

Overthrow \O`ver*throw"\, v. t. [imp. {Overthrew}; p. p.
   {Overthrown}; p. pr. & vb. n. {Overthrowing}.]
   1. To throw over; to overturn; to upset; to turn upside down.

            His wife overthrew the table.         --Jer. Taylor.

   2. To cause to fall or to fail; to subvert; to defeat; to
      make a ruin of; to destroy.

            When the walls of Thebes he overthrew. --Dryden.

            [Gloucester] that seeks to overthrow religion.
                                                  --Shak.

   Syn: To demolish; overturn; prostrate; destroy; ruin;
        subvert; overcome; conquer; defeat; discomfit; vanquish;
        beat; rout.